Automatic fire-alarm.



W. P. BRITAIN & G. J, PAGKMAN.' AUTOMATIC FIRE ALARM.

APPLIGATION FILED MAY '1; 1910.

995,221, "Patented June 13,1911.

UNITED mm PATENT OFFICE,

WILLIAM F. nnrram AND (mouse JOHN Pacmun, or wns'rrmuus, urssoo'ar.

Auromarxo emu-Amen.

Specification o! Letten Intent: Patented flune 13, 1911.

Application Mud Kay 7, 1810. krill In. 0,086.

TQ all whom it may concern:

Be it known that we, WILLIAM P. BRITAIN and Gnonon Jorm PACKMAN,citizens of the United Stat-es, residing at Westplains, in the county ofHowell and State of Missouri, have invented certain newand usefulImprovements in Automatic FireAlurms, of

' the which the following is a specification.

This invention relates to automatiofire alarms of that class in whichfusible elements are used to close the electric circui of alarms and thelike.

It has in view the construction of a deviceof the above nature comprisinouter and inner casin or members, to either one of which may $6 appliedan easilyiusible condu'ctive metal causing the same to fuse and form acontact between the casin when the temperature outside becomes hig erthan usual.

With theahove and further objects in view this invention consists in'the co1istruction, combination, and arrangement of parts all ashereinafter more fully described, specifically claimed, and illustratedin the accompanyin drawings, wherein- Figure 1 i ustrates the manner-inwhich resent invention is used; Fig. 2 is. a

longitudinal cross section of the device; Fig.

3 is a bottom plan view of the outer casing;

- Fig. 4 is a top plan view of the inner-casing; Fig. 5 is a plan viewof the insulating material for use with the resent invention; Fi 6 is across section 0 the device.

l toferrin more particularly to the 'drawings A indicates an alarm ofany nature such as. a hell or annunciator having the usual connectionsto the bat-tery. p v

-'Ihe present invention as indicated; at B may be connected to thecircuit wires at various (intervals and referslbly in places where firewould likeiy break out. .This device or electric circuit. closer B iscomposed of a plurality of plates or casings '1 and 2.. The outer ilate1 comprises a. cir

having a cone center 3 V and oppositely extending wings 4 and 5, the

cular piece of meta wing 4 being of greater length than the wing Theinner casing or plate 2 is similnrly constructml having a cone center 3'adapted to extend upwardly into the cone 3. Extending radially from theouter plate and extending'lateruliy from the wings 4 and 4 area-plurality of cars 6 adapted to be bent over the opposite casing forretaining the two together. Applied'to either cone center is an easilyfusible conductive metal 'or it may be applied to the outer face oi thecone 3 or to both as may be desired. This material or metal may be ofvariehle fusingpoints according to the positioning" of the same.

This device may be secured in any position but preferably against a sidewall or ceiling, the same making a sure contact of the two plates whenthe metal fuses. Any suitable means may be used in securing the circuitcloser to the wall, as a screw 10 to which also the wires may besecured, said screws piercing the wings i and 4'.

Having thus described our invention, what we claim as new is; V

1. In an electric circuit closer, the combination of an putter casinprovided. with c cone center, mi inner casing'providcd with a conecenter adapted to project into the first named cone center, a pluralityof cup-ositely extending wings secured to can ing, a plurali y ofradially extendin e, e on one casing, a plurality of lateraliv ex?tending ears on one wing of each casing, an insulating materialinterposed between said casings, and a fusiblecompound applied to onecone center for the purpose herein set forth.'

2. As 'an article of manufacture, an electric circuit closer, comprisings aced conducting members having conica portions,

the conical portion of one member nesting with the conical portion ofthe other mcmber,'-,insulat ing material interposed between. saidmembers, fusible metal applied to one member adapted to fuse and comlets the electric circuit, and ears provide on one member adapted tobind over onthe other 7 member for retaining said memberstogethcr saidears being insulated from said other member set forth;

3. As an article of manufacture, an electric circuit closer ,comprisingspaced oonducting plates provided with conical porfor ret tions, theconical portion of one member nesting with the conical portion oftheother member, an insulatingring interposed be- 5 tween said platesadjacent to the conical pgrtions, fusible metal applied to one memr andadapted to fuse. and complete the Wit-1 forth.

electric circuit, and ears provided on one plate adapted to bind overthe other plate aiming the plates together, said ears 10 being insulatedfrom sand other plate, as set WILLIAM P. BRITAIN.- GEORGE JOHN PAUKMAN.

eases: BEN-M. Amer, 11. M. LANE.

